feat: Implement MideaUART protocol layer with encoding/decoding, timing control, and AC command set

docs/plans/2026-07-05-ballu-ac-esp32c6-controller-implementation.md

@@ -32,14 +32,14 @@ Implementation of ESP32-C6 based AC controller that bridges Zigbee (Home Assista
 - [x] Update Readme.md
 
 ### Task 2: MideaUART Protocol Implementation
-- [ ] Implement Control structure for MideaUART commands
-- [ ] Create protocol encoder (Control → UART bytes)
-- [ ] Implement protocol decoder (UART bytes → Control/status)
-- [ ] Add timing control (50ms command spacing)
-- [ ] Implement AC command set: mode, temperature, power, fan
-- [ ] Write unit tests for encoding/decoding all command types
-- [ ] Run tests - must pass before next task
-- [ ] Update Readme.md
+- [x] Implement Control structure for MideaUART commands
+- [x] Create protocol encoder (Control → UART bytes)
+- [x] Implement protocol decoder (UART bytes → Control/status)
+- [x] Add timing control (50ms command spacing)
+- [x] Implement AC command set: mode, temperature, power, fan
+- [x] Write unit tests for encoding/decoding all command types
+- [x] Run tests - must pass before next task
+- [x] Update Readme.md
 
 ### Task 3: Zigbee Stack and ZCL Thermostat Cluster
 - [ ] Initialize Zigbee stack on ESP32-C6